Battery charger



FIG. 1 is a top, front, and right-side perspective view of a battery charger, showing my new design;

FIG. 2 is a top, front and left-side perspective view thereof, shown with the lid in the open position and on a reduced scale;

FIG. 3 is a top, front and left-side perspective view thereof, shown with the lid in the open position, a battery installed, and on a reduced scale;

FIG. 4 is a top, rear, and right-side perspective view thereof, shown with plug retracted;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a left-side elevational view thereof;

FIG. 8 is a right-side elevational view thereof;

FIG. 9 is a top plan view thereof; and,

FIG. 10 is a bottom plan view thereof.

The elements shown in dashed lines form no part of the claimed design. 

The ornamental design for a battery charger, as shown and described. 